MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 11/18/00 through 11/24/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 35,425 1,906,014
MED90 7,574 129,590
MED85 5,723 36,907
MED80 5,281 20,930
MED75 5,067 16,805
MED66 5,053 15,537
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,092 32,904
2-4 a.m. 383 11,242
4-6 a.m. 278 5,652
6-8 a.m. 927 29,733
8-10 a.m. 4,291 155,317
10-12 a.m. 10,007 360,857
12-2 p.m. 11,308 349,436
2-4 p.m. 12,750 439,939
4-6 p.m. 10,560 357,785
6-8 p.m. 5,423 188,147
8-10 p.m. 3,759 119,996
10-12 p.m. 2,345 74,775
__________ _____________ _________________
Total: 64,123 2,125,783
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 246
Davis 561
Irvine 14
Los Angeles 355
Riverside 51
San Diego 394
San Francisco 670
Santa Barbara 1
Santa Cruz 1
Lawrence Berkeley 12
Lawrence Livermore 0
Los Alamos 0
MELWEB 48,745
Searchlight 12,494
Other - UC 171
Other-Network UC 408
_____
64,123
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,361
Davis 5,839
Irvine 74
Los Angeles 4,142
Riverside 169
San Diego 4,534
San Francisco 6,145
Santa Barbara 4
Santa Cruz 1
Lawrence Berkeley 56
Lawrence Livermore 0
Los Alamos 0
MELWEB 2,091,203
Searchlight 5,702
Other - UC 635
Other-Network UC 4,918
_____
2,125,783
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.0
Standard deviation in seconds 3.4
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.5
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:34
Average session length (minutes:seconds) 16:18
Longest session recorded (minutes:seconds) 243:28
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 437.1
Retrievals per search - standard deviation 6039.0
Percent of searches completed with 0 results 36.3%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 64,123 14.1%
PRESENT 359,591 79.0%
INIT or CLOSE 30,864 6.8%
OTHER 324 0.1%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 3,857 4.2% 1,531 39.7% 5 994.8 4795.2
PERSONAL AUTHOR 15,638 17.2% 4,603 29.4% 8 82.4 858.4
TITLE WORD 6,212 6.8% 2,471 39.8% 3 142.7 1069.5
SUBSET 185 0.2% 62 33.5% 33 305.3 971.4
SUBJECT WORD 107 0.1% 50 46.7% 23 1773.7 7704.3
SUBJECT 1,788 2.0% 904 50.6% 19 539.1 4057.6
EXACT SUBJECT 3,740 4.1% 972 26.0% 32 584.1 3556.3
MAJOR SUBJECT 147 0.2% 59 40.1% 19 658.9 2575.4
EXACT MAJOR SUBJ 377 0.4% 69 18.3% 31 350.4 1310.2
EXACT TITLE 458 0.5% 280 61.1% 1 5.1 14.6
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 840 0.9% 226 26.9% 466 1790.7 3480.8
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 2 0.0% 1 50.0% 35 35.0 0.0
KEYWORD 41,016 45.1% 15,662 38.2% 18 874.3 9355.7
DATE 1,318 1.4% 339 25.7% 8 170.9 1631.8
LANGUAGE 5,778 6.4% 1,766 30.6% 22 383.0 2255.2
UNIQUE ID 350 0.4% 116 33.1% 1 1.2 1.0
ADDED 1,008 1.1% 817 81.1% 2 3.8 5.6
PUB TYPE 2,336 2.6% 560 24.0% 25 193.6 1143.8
AUTHOR AFFIL. 501 0.6% 213 42.5% 8 25.5 116.7
CHEMICAL NAME 2 0.0% 2 100% 0 0.0 0.0
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 4,812 5.3% 1,604 33.3% 19 605.3 3634.1
AGE 153 0.2% 27 17.6% 32 125.9 250.0
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 87 0.1% 28 32.2% 52 246.6 653.7
XXS 148 0.2% 75 50.7% 5 639.3 2031.8
XMXS 59 0.1% 28 47.5% 56 514.7 1183.8
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 14 0.0% 11 78.6% 88 68.0 34.6
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 17,263 26.9% 6,170 35.7% 9 313.8 2425.0
Single 46,860 73.1% 17,092 36.5% 17 824.6 8721.4
PRESENT commands, by type:
MARC 30.2%
OPAC 27.1%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS